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Deferred Policy Acquisition Costs (Tables)
12 Months Ended
Dec. 31, 2023
Insurance [Abstract]  
Reconciliation of beginning and ending deferred policy acquisition costs
Twelve Months Ended December 31, 2023Twelve Months Ended December 31, 2022
($ in millions)
Balance at the beginning of the period$319.0 $290.8 
Acquisition costs deferred357.4 460.0 
Amortization of deferred acquisition costs(380.2)(431.8)
Balance at the end of the period$296.2 $319.0